Finding the Fourth Proportional to 1,920.61, 2,650.62 and 1,081.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.61 : 2,650.62 = 1,081.27 : x
2. Step 2: Convert to fraction form
   1,920.61/2,650.62 = 1,081.27/x
3. Step 3: Cross multiply
   1,920.61x = 2,650.62 × 1,081.27
4. Step 4: Simplify right side
   1,920.61x = 2,866,035.89
5. Step 5: Solve for x
   x = 2,866,035.89/1,920.61
6. Step 6: Final answer
   x = 1,492.25